Lishi He ikbear

Distributed Read-Write Mutex in Go

The default Go implementation of sync.RWMutex does not scale well to multiple cores, as all readers contend on the same memory location when they all try to atomically increment it. This gist explores an n-way RWMutex, also known as a "big reader" lock, which gives each CPU core its own RWMutex. Readers take only a read lock local to their core, whereas writers must take all locks in order.

Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

Does the design expect failures to happen regularly and handle them gracefully?
Have we kept things as simple as possible?

部门：客户体验平台部

使命：打造企业服务市场领域体验最杰出的客户服务平台

具体工作：

与产品和服务部门共同设计客户体验管理（CEM）流程
将确定的客户体验管理流程产品化
基于收集的数据评估客服体验管理流程的效果，持续改进流程和产品

ngClass 指令允许我们基于表达式的结果为指定 DOM 对象添加／删除 CSS class

例如，若 expression 为 true，为元素添加 class="class-a"：

<div ng-class="{ class-a: expression }"></div>

同时，多个 class 可以分别基于多个表达式的结果：

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no" />
	<title>Sewise Player</title>
	<style type="text/css">
	body{
	margin: 0px;

	#include <stdio.h>

	int binary_search(int *a, int length, int target)
	{
	int left = 0;
	int right = length - 1;
	int middle = 0;
	while (left <= right)
	{
	middle = (left + right) >> 1;

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	#define ERROR_DATA -999999

	typedef struct {
	int *pData;
	int length;
	int top;

	package main

	import "fmt"
	import "sort"

	type BySortIndex []int

	func (a BySortIndex) Len() int { return len(a) }
	func (a BySortIndex) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
	func (a BySortIndex) Less(i, j int) bool {

	// URL: http://stackoverflow.com/questions/24864956/angularjs-how-do-i-access-directive-attribute-in-controller

	app.directive('rating', [function () {
	return {
	restrict: 'E',
	scope: {
	maxStars: '=',
	url: '@'
	},
	controller: 'ratingController'

	include $(GOROOT)/src/Make.inc

	GOFMT=gofmt -spaces=true -tabindent=false -tabwidth=4

	all:
	$(GC) jsontest.go
	$(LD) -o jsontest.out jsontest.$O

	format:
	$(GOFMT) -w jsontest.go